Hey folks many people are having problems on Jailbreaking Untethered on iOS4.2.1 by using Greenpois0n RC5. Now the beta2 is out and still many people are facing problems and can’t get Cydia via loader, So this guide is specially for them. Remember that your Device should be Plugged in All the time Dont Disconnect it. This guide is for all the iDevices which include iPhone3GS,iPhone4,iPod2G (MC Model),iPod3G,iPod4G.

Thanks to vonswankoFSM for helping me out and i some how did it. So follow the guide and enjoy.

Steps to Follow:

Step#1:

Start from scratch. Restore, reboot your MAC and Device . If you’re on a Laptop, make sure its plugged in. And Quit iTunes First

Restore worked for me. So it is up to you what you want to do. And one more ting when i restored to iOS4.2.1 i got stuck on Recovery Logo and i didnt use Tiny Umbrella or Any thing Just did the steps and made it. So it is up to you what you want to do.

Step#2:

Download the Greenpois0n RC5b3 From here. Thanks to @Ven000m for uploading it.

When you are in Show Package Content, you will see a folder with the name of Contents

Go to Contents> MAC OS

You will see a file with the name greenpois0n

Step#5:

Now open Terminal from your MAC

and type in SUDO and after that grab the above file greenpois0n after a space in the terminal.

When you will press enter it will ask for the Password.

Type in your Password and press enter.

Step#6

When you will press enter, Greenpois0n will be opened automatically

Then press Jailbreak and follow the steps and enjoy.

If you get something like unable to find gb devlist and stuck on it and + this two more errors.

So just wait a little and don’t worry it will process further and in no time you will be Jailbroken and will have the loader. If you face any problems with this so do post below or on our Facebook page.

As the greenpois0n website is down and people are not having Cydia in the Loader. You got 2 options either read Below or wait till the website is up.

I found a bug when exit Cydia iPhone reboots 2 to 3 times. So if you face any so let me know. So dont do the second part the redsn0w one and wait for the Loader to come up.

If you wish to have Cydia now so Follow the Steps Below.

Step#1:

Download redsn0w 0.9.7b6 for MACDownload iOS4.2.1 for your own respected Device from here.

Step#2:

Open redsn0w and browse for the iOS4.2.1

When prompted with this Message so press YES

Step#3:

Go next and Check install Only Cydia.

Ste#4

Go next and make sure your Device is powered off and Plugged in.

Then follow the simple Steps and put it into DFU mode.

Once you are done with the DFU redsn0w will dot the rest. You will have to just sit back and enjoy.

When it will be done it will say Finish and it will reboot. When you see Apple logo not to do any thing just see it go Animated and you are all done. Once it boots up you will have the Cydia and the Loader. Uninstall the Loader and enjoy the Untethered Jailbreak.

I found a bug when exit Cydia iPhone reboots 2 to 3 times. So if you face any so let me know. So dont do the second part the redsn0w one and wait for the Loader to come up.